Stitch setter attachment for sewing machines



Oct. 17, 1950 F. M. SCHRIBERT STITCH SETTER ATTACHMENT FOR SEWING MACHINES Filed April 1, 1949 VIIIIAIVIIIII/ Will/14mm t aw Z a f 4 Z Z M M Patented Oct. 17, i950 STITCH SETTER ATTACHMENT FOR SEWING MACHINES Frank M. Schribert, Chicago, Ill

Application April 1, 1949, Serial No. 84,852

4 Claims.

This invention relates to an attachment for a sewing machine, and more particularly to an attachment which slips over the sewing needle and adapts the machine to do special work such as making button holes, doing embroidery work, mending, etc.

The primary object of the invention is to provide a very simple device which can be mounted on the needle bar, and when the ordinary presser foot of the sewing machine has been removed, will hold the material to be sewed onto the needle plate and cause the stitch to be set without cutting or fraying the sewing thread.

Another object of the invention is to provide a special small foot which is impaled by the needle and is urged downwardly against the work by a compression spring. The foot has a heel or downward projection which is offset from the vertical plane of the eye of the needle, so that the projection will not bear against the sewing thread.

A further object of the invention is to provide a mounting for the foot which will hold the heel out of the plane of the needle eye and prevent it from twisting out of proper position.

Another object of the invention is to provide a very simple attachment which will enable the operator to sew in any direction when the ordinary presser foot of the sewing machine is removed.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which Figure l is an elevational view of the end of the arm of a sewing machine, showing the face plate, presser bar and needle bar with the attachment installed; Fig. 2 is a fragmentary enlarged view showing the sewing bar in retracted position; Fig. 3, is a view similar to Fig. 2, with the needle bar in its lower sewing position; and Fig. 4, a front elevational View of the device attached to the needle bar.

In the embodiment illustrated, a conventional sewing machine has a face plate provided with a thread tensioning device 6, to which a sewing thread i is led from the top of the machine and around a take-up 8, through the eye of a needle 9 mounted on the lower end of a needle bar It]. In using the device, the presser foot is removed from the lower end of the presser bar II, and

the bar is retracted by the presser bar lift lever E2. The machine also has a needle plate l3 provided with a needle hole I4 through which the needle 9 is projected to cooperate with the bobbin thread. The needle is detachably secured to the needle bar by means of a clamp l5 provided with a clamp crew I6. This mechanism is all of known and conventional construction.

The attachment, in its preferred construction, has a collar I! provided with an opening to receive the needle 9 and abut against a needle shoulder 9a. provided by the needle shank 91). An arm 18 is permanently secured to the collar ii, and may be in the form of a thin spring having a loop portion I 9 which may be snapped over the clamping screw it, to hold the collar up against the shoulder 9a and prevent it from twisting on the needle. A compression spring 25 is impaled by the needle and is permanently secured at its upper end to the collar H. A foot 2| is shown impaled by the needle and is permanently secured to the lower end. of the spring 20. The foot, preferably, has a heel portion 2m which is disposed out of the vertical plane extending through the eye of the needle. Preferably, the heel is disposed rearwardly to engage material which is advanced past sewing position. If desired, more than one projection 2 la may be provided on the foot, but they should be arranged out of the vertical plane of the eye So, so that they will not press against the sewing thread when the needle is projected through the needle plate.

To apply the device to a conventional machine, the presser foot is removed and the presser bar is raised by the lever l2. The stitch setter then slips over the needle and the arm i8 is snapped over the clamping screw [6. During the sewing operation the attachment descends with the needle bar and the foot engages the material to be sewed, resting on the sewing plate, and holds it firmly while the needle continues its downward stroke without gripping the sewing thread against the material. The material is still engaged by the foot while the needle is partially retracted and until the compression in the spring 2|] is relieved sufficiently to permit it to lift the foot back up into the position shown in Fig. 2.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled in the art.

I claim:

1. A stitch setter attachment for the needle bar of a sewing machine comprising: a collar having an opening to receive the shaft of a needle and abut against the shoulder of the needle shank; an arm secured to said collar and adapted to fasten the collar to the needle bar of the sewing machine; a helical compression spring having its upper end secured to said collar and extending downwardly to embrace the lower shaft of the needle projecting through the collar; and a foot secured to the lower end of said spring and having an opening for the needle, said foot having a downwardly extending projection offset from the vertical plane of the eye of the needle to provide clearance for a thread extending through said eye.

2. An attachment as specified in claim 1, in which the projection is in the form of a single heel disposed rearwardly so as to engage material which has advanced past sewing position.

3. An attachment as specified in claim 1, in which the arm is formed of spring wire and is 4 shaped to snap around the needle clamp screw of the sewing machine.

4. A stitch setter attachment for the needle bar of a sewing machine comprising: a helical compression spring, adapted to be snugly impaled by a sewing needle, and having an arm for holding said spring on the needle bar of the sewing machine; and a foot secured to the lower end of said spring and having an opening for the needle, said foot having a downwardly extending projection offset from the vertical plane of the eye of the needle to provide clearance for a thread extending through said eye.

FRANK M. SCI-IRIBERT.

No references cited. 

